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831 questions written from the official handbooks, each one naming the section and page it was read from. Answer it, see why, then go and check us if you want to.
Correct · A
A driver is behind a 60-foot rig at 35 mph. Using the one-second-per-ten-feet rule, how many seconds of following distance should they keep?
Texas Commercial Motor Vehicle Drivers Handbook, 2.7.1 – Space Ahead, p. 2-16
The knowledge test every commercial driver takes, whatever class or endorsement they are after.
Required before you may drive any commercial vehicle with air brakes.
Required for a Class A licence. Coupling and uncoupling, off-tracking, trailer brakes and the handling of a vehicle that is jointed in the middle.
The H endorsement. Placarding, shipping papers, loading and segregation rules, and what to do when something leaks.
The N endorsement. Surge, baffles, bulkheads, high centre of gravity and the way a part-full tank changes how a vehicle stops and turns.
The T endorsement. Coupling and uncoupling multiple trailers, converter dollies, crack-the-whip and the inspection points a second trailer adds.
The P endorsement. Pre-trip and post-trip checks on a bus, loading and unloading, standee lines, and handling passengers on the road.
The S endorsement, taken alongside the passenger endorsement. Danger zones, mirror adjustment, loading and unloading students, and railroad crossings.
A study drill for the pre-trip inspection.
Why PassLane
Most practice tests hand you an answer and stop there. This one hands you the answer, the document it came from and the page it sits on, so you can tell a question somebody checked from a question somebody invented.
Every published question names its document, section, page and the date it was read. Miss one of those and it cannot go live.
Questions are pulled from the bank when you start, weighted across the subjects the test covers. No fixed order to memorise.
The result splits your score across topics, then retries only the questions you missed. One weak subject, one revision session.
One question per page, no app to install, nothing to swipe. It works in a cab at midnight on one bar of service.
How it works
No account, no email, no upsell. Open the page, pick a test and start answering.
Step one
General knowledge first, then whichever endorsements the job needs: air brakes, combination vehicles, hazmat, tanker, doubles and triples, passenger or school bus.
Step two
One question a page, one tap to answer. The reason you were right or wrong opens the next page, at the one moment you actually care what the reason was.
Step three
Every explanation carries the handbook it was read from, the section and the page. Read it once in the original and it tends to stay read.
No strings, ever
We do not want your email, your card or your name. The site is paid for by the ads beside the questions, which is the whole business model and all of it.
The short version of how the site works and what it will not do for you.
The knowledge test is federal. 49 CFR 383.111 sets the subjects every state has to examine you on, which is why one national question bank serves all of them. What changes at a state line is the paperwork: the age limits, the pass mark, how long you hold a permit. Those sit on the state pages as one cited fact per line, and we leave fees to the agency because they change without notice.
Every published question names the handbook, the section, the page and the date it was read. They are written in our own words from the official state handbooks, 49 CFR Part 383 and the MUTCD. Nothing is copied from another practice-test site.
It is not your state's real test, and nobody outside the licensing agency has that. It is the same material, cited so you can check it, and drawn fresh each time so you end up learning it rather than learning an order.
Page numbers differ between editions, so every source is stored with its edition label and the date we last checked it.
The things people ask before they take the first one.
Every question names the document and page behind it, so a wrong answer is something you can prove rather than argue about.
Start with general knowledge
50 questions drawn fresh, 40 of them right to pass, untimed. It takes one tap to begin and nothing at all to finish.